US20170314520A1 - Fuel supply apparatus in construction machine - Google Patents
Fuel supply apparatus in construction machine Download PDFInfo
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- US20170314520A1 US20170314520A1 US15/526,482 US201515526482A US2017314520A1 US 20170314520 A1 US20170314520 A1 US 20170314520A1 US 201515526482 A US201515526482 A US 201515526482A US 2017314520 A1 US2017314520 A1 US 2017314520A1
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- Prior art keywords
- fuel
- fuel supply
- supply pump
- control section
- amount
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0076—Details of the fuel feeding system related to the fuel tank
- F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/40—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements with means for detection of clogging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/44—Filters structurally associated with pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/50—Filters arranged in or on fuel tanks
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- F02M2037/228—
Definitions
- the present invention relates to the technical field of a fuel supply apparatus in a construction machine such as a hydraulic excavator.
- a construction machine such as a hydraulic excavator may be supplied with fuel directly from a fuel container such as a drum at a working site.
- a traveling machine body in some such construction machines is equipped with a fuel supply pump (fuel pump or refueling pump).
- fuel supply pump fuel pump or refueling pump
- Some of these construction machines configured as follows are known: when a fuel supply pump is used for fuel supply, a sensor in the construction machine detects that the construction machine is full of fuel to allow the fuel supply pump to be automatically stopped (for example, Patent Documents 1 and 2).
- a strainer filter
- fuel supply is delayed, degrading workability.
- a sensor in the construction machine detects the pressure in the strainer, and when the detected pressure is equal to or higher than a predetermined value, it is determined that the strainer is clogged and the fuel supply pump is automatically stopped (see, for example, Patent Document 3).
- Patent Document 1 Japanese Patent Application Laid-open No. 2000-264078
- Patent Document 2 Japanese Patent Application Laid-open No. 2005-16332
- Patent Document 3 Japanese Patent Application Laid-open No. 2011-173590
- Patent Document 4 Japanese Utility Model Application Publication No. H7-13549
- a first aspect of the present invention is a construction machine including a fuel tank, a fuel supply pump for supplying fuel to the fuel tank, a strainer that filters the fuel supplied to the fuel tank, and a control section that calculates a remaining amount of fuel in response to a signal from a fuel gauge measuring the amount of fuel remaining in the fuel tank, and then output the calculated remaining amount data to a fuel meter to allow the fuel meter to display the amount.
- the control section includes fuel supply determining means for determining whether or not fuel is being fed into the fuel tank when the fuel supply pump is active, and fuel supply pump stopping means for stopping the fuel supply pump when the fuel supply determining means determines that fuel supply has been disrupted.
- a second aspect of the present invention is the fuel supply apparatus in the construction machine in the first aspect in which the control section includes fuel supply amount determining means for, when the fuel supply determining means determines that the fuel is being supplied, determining whether or not an amount of the fuel supplied is larger than a preset set supply amount such that, when the fuel supply amount determining means determines that the fuel supply amount is not larger than the set supply amount, the fuel supply pump stopping means stops the fuel supply pump.
- a third aspect of the present invention is the fuel supply apparatus in the construction machine in the first or second aspect including notification means, in which the control means includes notification control means for allowing the notification means to give a notification when the fuel supply pump stopping means stops the fuel supply pump.
- a fourth aspect of the present invention is the fuel supply apparatus in the construction machine in one of the first to third aspects in which the control section includes timer control means for allowing the fuel supply pump stopping means to stop the fuel supply pump when a fuel supply stoppage condition has lasted for a preset timer time.
- the control section which performs display control on the fuel meter based on an instruction from the fuel gauge, can determine that fuel supply has been disrupted. This enables the need for a dedicated fuel supply sensor to be eliminated.
- control section can determine that the strainer is clogged, allowing the need for a dedicated strainer clog sensor to be eliminated.
- the notification by the notification means allows an operator to determine that the fuel supply pump is stopped due to disruption of fuel supply before completion or an insufficient amount of fuel supplied. This improves workability.
- the fuel supply pump is reliably stopped when fuel supply is disrupted before completion or when an insufficient amount of fuel is supplied.
- FIG. 1 is a general side view of a hydraulic excavator
- FIG. 2 is a side view of a fuel tank
- FIG. 3 is a block circuit diagram of a control system
- FIG. 4 is a flowchart of the control system.
- the hydraulic excavator includes a traveling machine body 1 .
- the traveling machine body 1 includes a lower traveling body 2 like a crawler and an upper slewing body 3 mounted on the lower traveling body 2 so as to be able to slew around a vertical axis.
- the upper slewing body 3 has various member apparatuses such as a front working section 4 with a boom 4 a, an arm 4 b, and a bucket 4 c, an operation room (cab) 5 , an engine room 6 , a counterweight 7 , a fuel tank 8 , and a hydraulic oil tank 9 .
- a hose 10 for fuel supply is connected to a fuel supply port 8 a of the fuel tank 8 .
- the hose 10 is connected to a supply port of a fuel supply pump 12 integrated with a strainer 11 set in the fuel supply port 8 a.
- Fuel is fed into the fuel tank 8 as follows. With a tip of the hose 10 inserted into a fuel container 13 such as a drum, a fuel supply switch 14 provided in the operation room 5 is turned on. This operation signal is input to a control section CPU including a microcomputer. Based on the operation signal, the control section CPU outputs an operation instruction to the fuel supply pump 12 .
- the fuel supply pump 12 is thus actuated to feed the fuel into the fuel tank 8 via the strainer 11 .
- the fuel supply pump 12 and the strainer 11 may of course be separated from each other instead of being integrated together.
- a fuel gauge 15 is provided on a side surface plate 8 b of the fuel tank 8 .
- a gauge main body 15 a of the fuel gauge 15 extending into the fuel tank 8 has an arm 15 c that pivots around a support shaft 15 b in an up-down direction.
- Afloat 15 d is provided at a tip of the arm 15 c.
- a potentiometer 15 e converts, into an electrical signal, a pivoting amount (pivoting angle) by which the arm 15 c pivots in conjunction with up-down movement of the float 15 d floating on a surface of the fuel remaining in the fuel tank 8 .
- the signal is input to the control section CPU, which then calculates the amount of the fuel remaining in the fuel tank 8 based on the input electrical signal.
- the control section CPU outputs a control instruction to a fuel meter 16 to allow the fuel meter 16 to display the result of the calculation.
- the control section CPU controls determination of a fuel supply amount. A procedure for this determination control will be described below using a flowchart in FIG. 4 .
- a fuel supply amount determination control routine is started.
- the control section CPU determines whether or not fuel has been supplied, in other words, whether or not an electrical signal from the potentiometer 15 e has changed to a fuel increase side (S 1 ).
- the result of the determination is NO, indicating that no fuel has been supplied, whether or not a first timer 17 has been set is determined (S 2 ).
- the control section CPU sets the first timer 17 (S 3 ) and returns to S 1 where whether or not fuel has been supplied is determined. Then, when the control section CPU determines again in S 2 that no fuel has been supplied and the determination result in S 2 is YES, indicating that the first timer 17 has been set, the control section CPU determines whether or not a count time C 1 counted by the first timer 17 exceeds a timer time (for example, five seconds) T 1 (C 1 >T 1 ) (S 4 ). When the determination result is NO, indicating that the count time C 1 does not exceed the timer time T 1 .
- the control section CPU returns again to determination of whether or not fuel has been supplied in S 1 .
- the determination result in S 4 is YES, indicating that the count time C 1 exceeds the timer time T 1
- the control section CPU determines that no fuel has been supplied to output a stoppage instruction to the fuel supply pump 12 (S 5 ), while outputting a notification instruction to first notification means 18 such as a buzzer (S 6 ).
- the control section CPU calculates a supply amount (an increase amount) U per unit time (S 7 ) to determine whether or not the supply amount U is larger than a preset set supply amount X per unit time (U>X?) (S 8 ).
- the control section CPU determines whether or not a second timer 19 has been set (S 9 ).
- the control section CPU sets the second timer 19 (S 10 ) and returns to S 1 where the control section CPU determines whether or not fuel has been supplied.
- the control section CPU determines whether a count time C 2 counted by the second timer 19 exceeds a preset timer time (for example, 10 seconds) T 2 (C 2 >T 2 ) (S 11 ).
- a preset timer time for example, 10 seconds
- T 2 a preset timer time
- the control section CPU returns to S 1 where the control section CPU determines whether or not fuel has been supplied.
- the control section CPU determines that the fuel supply amount is smaller than the set supply amount to output the stoppage instruction to the fuel supply pump 12 (S 12 ).
- the control section CPU also outputs the notification instruction to second notification means 20 (S 13 ).
- the control section CPU determines whether or not the fuel tank 8 has been filled up (the fuel tank 8 is full) (S 14 ).
- the determination result is NO, indicating that the fuel tank 8 is not full, the control section CPU returns again to S 1 where the control section CPU determines whether or not fuel has been supplied.
- the control section CPU When the determination result is YES, indicating that the fuel tank 8 is full, the control section CPU outputs the stoppage instruction to the fuel supply pump 12 (S 15 ), while outputting the notification instruction to third notification means 21 (S 16 ), thus notifying an operator that the fuel supply operation has ended.
- the first, second, and third notification means 18 , 20 , and 21 may be single notification means.
- the single notification means allows the operator to recognize that the fuel supply pump 12 has been stopped, by varying the contents of the notification according to the situation.
- the fuel supply pump 12 if the fuel container 13 becomes empty to disrupt fuel supply started by turning on the fuel supply switch 14 , the fuel supply pump 12 is automatically stopped and can thus be prevented from being seized.
- the automatic stoppage of the fuel supply pump 12 is based on the determination, by the control section CPU, of whether or not fuel has been supplied based on the signal from the fuel gauge 15 , which monitors the amount of fuel remaining in the fuel tank 8 . This eliminates the need for a dedicated sensor that monitors fuel supply. As a result, the number of components can be reduced, and the maintenance of the sensor is not needed.
- the strainer 11 when the fuel supply amount is determined to be excessively small during fuel supply, the strainer 11 is determined to be clogged, and this is determined to be abnormal. Then the fuel supply pump is automatically stopped. As a result, measures for dealing with the clogged strainer 11 can be immediately taken to improve workability. Determination of whether or not the strainer 11 is clogged is made based on calculation by the control section CPU, which makes determination for the case where fuel supply has been disrupted. This eliminates the need for a dedicated sensor that detects the clog, thus reducing the number of components and enhancing maintainability.
- the first and second sensors 18 and 20 give notifications to the operator to allow the operator to immediately recognize that fuel supply has been abnormal.
- the present invention can be utilized in the field of a fuel supply apparatus in a construction machine such as a hydraulic excavator.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
A fuel supply apparatus able to stop actuating of a fuel supply pump without mounting a special fuel supply sensor when the fuel supply is stopped or becomes slow, includes a control section which calculates an amount of the fuel in the fuel tank based upon a signal from a fuel gauge, and outputs the result to a fuel meter. The control section also calculates from the fuel gauge signal the amount of the supplied into the fuel tank per unit of time, and if the amount of the fuel supplied per unit of time is determined to be less than a set supply rate, the fuel supply pump is stopped so that a malfunction of the fuel supply can be detected without mounting a special fuel supply sensor.
Description
- The present invention relates to the technical field of a fuel supply apparatus in a construction machine such as a hydraulic excavator.
- In general, a construction machine such as a hydraulic excavator may be supplied with fuel directly from a fuel container such as a drum at a working site. In preparation for such a case, a traveling machine body in some such construction machines is equipped with a fuel supply pump (fuel pump or refueling pump). Some of these construction machines configured as follows are known: when a fuel supply pump is used for fuel supply, a sensor in the construction machine detects that the construction machine is full of fuel to allow the fuel supply pump to be automatically stopped (for example,
Patent Documents 1 and 2). - At the working site, fuel supply may be performed in an adverse environment where, for example, dust flies around. In view of such a case, a strainer (filter) is provided to prevent foreign matter from being mixed into a fuel tank. However, if the strainer is clogged, fuel supply is delayed, degrading workability. Thus, some of the construction machines configured as follows are known: a sensor in the construction machine detects the pressure in the strainer, and when the detected pressure is equal to or higher than a predetermined value, it is determined that the strainer is clogged and the fuel supply pump is automatically stopped (see, for example, Patent Document 3).
- Some other construction machines configured as follows are known: if the fuel container becomes empty during fuel supply and therefore the fuel supply is stopped, then the fuel supply pump runs idly and may be seized; to avoid this, a sensor which detects that fuel supply has been disrupted is provided, and when the sensor issues a signal indicating that fuel supply has been disrupted, the fuel supply pump is automatically stopped (see, for example, Patent Document 4).
- Patent Document 1: Japanese Patent Application Laid-open No. 2000-264078
- Patent Document 2: Japanese Patent Application Laid-open No. 2005-16332
- Patent Document 3: Japanese Patent Application Laid-open No. 2011-173590
- Patent Document 4: Japanese Utility Model Application Publication No. H7-13549
- However, all of the above-described construction machines use a dedicated sensor for detection to automatically stop the fuel supply pump based on the detection, leading to an increased number of components. Furthermore, the sensor needs to be maintained, disadvantageously degrading workability and increasing costs. These are problems to be solved by the present invention.
- In view of these circumstances, the present invention has been created in order to solve the above-described problems. A first aspect of the present invention is a construction machine including a fuel tank, a fuel supply pump for supplying fuel to the fuel tank, a strainer that filters the fuel supplied to the fuel tank, and a control section that calculates a remaining amount of fuel in response to a signal from a fuel gauge measuring the amount of fuel remaining in the fuel tank, and then output the calculated remaining amount data to a fuel meter to allow the fuel meter to display the amount. The control section includes fuel supply determining means for determining whether or not fuel is being fed into the fuel tank when the fuel supply pump is active, and fuel supply pump stopping means for stopping the fuel supply pump when the fuel supply determining means determines that fuel supply has been disrupted.
- A second aspect of the present invention is the fuel supply apparatus in the construction machine in the first aspect in which the control section includes fuel supply amount determining means for, when the fuel supply determining means determines that the fuel is being supplied, determining whether or not an amount of the fuel supplied is larger than a preset set supply amount such that, when the fuel supply amount determining means determines that the fuel supply amount is not larger than the set supply amount, the fuel supply pump stopping means stops the fuel supply pump.
- A third aspect of the present invention is the fuel supply apparatus in the construction machine in the first or second aspect including notification means, in which the control means includes notification control means for allowing the notification means to give a notification when the fuel supply pump stopping means stops the fuel supply pump.
- A fourth aspect of the present invention is the fuel supply apparatus in the construction machine in one of the first to third aspects in which the control section includes timer control means for allowing the fuel supply pump stopping means to stop the fuel supply pump when a fuel supply stoppage condition has lasted for a preset timer time.
- In the first aspect of the present invention, if a fuel container becomes empty during fuel supply, which is thus disrupted before completion, the control section, which performs display control on the fuel meter based on an instruction from the fuel gauge, can determine that fuel supply has been disrupted. This enables the need for a dedicated fuel supply sensor to be eliminated.
- In the second aspect of the present invention, the control section can determine that the strainer is clogged, allowing the need for a dedicated strainer clog sensor to be eliminated.
- In the third aspect of the present invention, the notification by the notification means allows an operator to determine that the fuel supply pump is stopped due to disruption of fuel supply before completion or an insufficient amount of fuel supplied. This improves workability.
- In the fourth aspect of the present invention, the fuel supply pump is reliably stopped when fuel supply is disrupted before completion or when an insufficient amount of fuel is supplied.
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FIG. 1 is a general side view of a hydraulic excavator; -
FIG. 2 is a side view of a fuel tank; -
FIG. 3 is a block circuit diagram of a control system; and -
FIG. 4 is a flowchart of the control system. - An embodiment of the present invention will be described based on the drawings. As depicted in the drawings, a hydraulic excavator that is an example construction machine is configured as in the case of the related art. The hydraulic excavator includes a
traveling machine body 1. Thetraveling machine body 1 includes a lower travelingbody 2 like a crawler and anupper slewing body 3 mounted on the lower travelingbody 2 so as to be able to slew around a vertical axis. Theupper slewing body 3 has various member apparatuses such as afront working section 4 with aboom 4 a, anarm 4 b, and abucket 4 c, an operation room (cab) 5, anengine room 6, acounterweight 7, afuel tank 8, and ahydraulic oil tank 9. - A
hose 10 for fuel supply is connected to afuel supply port 8 a of thefuel tank 8. Thehose 10 is connected to a supply port of afuel supply pump 12 integrated with astrainer 11 set in thefuel supply port 8 a. Fuel is fed into thefuel tank 8 as follows. With a tip of thehose 10 inserted into afuel container 13 such as a drum, afuel supply switch 14 provided in theoperation room 5 is turned on. This operation signal is input to a control section CPU including a microcomputer. Based on the operation signal, the control section CPU outputs an operation instruction to thefuel supply pump 12. Thefuel supply pump 12 is thus actuated to feed the fuel into thefuel tank 8 via thestrainer 11. In this case, thefuel supply pump 12 and thestrainer 11 may of course be separated from each other instead of being integrated together. - A
fuel gauge 15 is provided on aside surface plate 8 b of thefuel tank 8. A gaugemain body 15 a of thefuel gauge 15 extending into thefuel tank 8 has anarm 15 c that pivots around asupport shaft 15 b in an up-down direction.Afloat 15 d is provided at a tip of thearm 15 c. Apotentiometer 15 e converts, into an electrical signal, a pivoting amount (pivoting angle) by which thearm 15 c pivots in conjunction with up-down movement of thefloat 15 d floating on a surface of the fuel remaining in thefuel tank 8. The signal is input to the control section CPU, which then calculates the amount of the fuel remaining in thefuel tank 8 based on the input electrical signal. The control section CPU outputs a control instruction to afuel meter 16 to allow thefuel meter 16 to display the result of the calculation. - When the
fuel supply switch 14 is turned on, the control section CPU controls determination of a fuel supply amount. A procedure for this determination control will be described below using a flowchart inFIG. 4 . As described above, when thefuel supply switch 14 is turned on, a fuel supply amount determination control routine is started. First, the control section CPU determines whether or not fuel has been supplied, in other words, whether or not an electrical signal from thepotentiometer 15 e has changed to a fuel increase side (S1). When the result of the determination is NO, indicating that no fuel has been supplied, whether or not afirst timer 17 has been set is determined (S2). When the result of the determination is NO, indicating that thefirst timer 17 has not been set (thefirst timer 17 has been reset), the control section CPU sets the first timer 17 (S3) and returns to S1 where whether or not fuel has been supplied is determined. Then, when the control section CPU determines again in S2 that no fuel has been supplied and the determination result in S2 is YES, indicating that thefirst timer 17 has been set, the control section CPU determines whether or not a count time C1 counted by thefirst timer 17 exceeds a timer time (for example, five seconds) T1 (C1>T1) (S4). When the determination result is NO, indicating that the count time C1 does not exceed the timer time T1. The control section CPU returns again to determination of whether or not fuel has been supplied in S1. On the other hand, when the determination result in S4 is YES, indicating that the count time C1 exceeds the timer time T1, the control section CPU determines that no fuel has been supplied to output a stoppage instruction to the fuel supply pump 12 (S5), while outputting a notification instruction to first notification means 18 such as a buzzer (S6). - In contrast, when the determination result in S1 is YES, indicating that fuel has been supplied, the control section CPU calculates a supply amount (an increase amount) U per unit time (S7) to determine whether or not the supply amount U is larger than a preset set supply amount X per unit time (U>X?) (S8). When the determination result is NO, indicating that the supply amount U is not larger than the set supply amount X, the control section CPU determines whether or not a
second timer 19 has been set (S9). When the determination result is NO, indicating that thesecond timer 19 has not been set, the control section CPU sets the second timer 19 (S10) and returns to S1 where the control section CPU determines whether or not fuel has been supplied. In contrast, when the determination result in S9 is YES, indicating that thesecond timer 19 has been set, the control section CPU determines whether a count time C2 counted by thesecond timer 19 exceeds a preset timer time (for example, 10 seconds) T2 (C2>T2) (S11). When the determination result is NO, indicating that the count time C2 does not exceed the timer time T2, the control section CPU returns to S1 where the control section CPU determines whether or not fuel has been supplied. On the other hand, when the determination result in S11 is YES, indicating that the count time C2 in thesecond timer 19 exceeds the timer time T2 (C2>T2), the control section CPU determines that the fuel supply amount is smaller than the set supply amount to output the stoppage instruction to the fuel supply pump 12 (S12). The control section CPU also outputs the notification instruction to second notification means 20 (S13). - On the other hand, when the determination result in the above-described S8 is YES, indicating that the fuel supply amount U per unit time is larger than the preset set supply amount X per unit time (U>X), the control section CPU determines whether or not the
fuel tank 8 has been filled up (thefuel tank 8 is full) (S14). When the determination result is NO, indicating that thefuel tank 8 is not full, the control section CPU returns again to S1 where the control section CPU determines whether or not fuel has been supplied. When the determination result is YES, indicating that thefuel tank 8 is full, the control section CPU outputs the stoppage instruction to the fuel supply pump 12 (S15), while outputting the notification instruction to third notification means 21 (S16), thus notifying an operator that the fuel supply operation has ended. - The first, second, and third notification means 18, 20, and 21 may be single notification means. The single notification means allows the operator to recognize that the
fuel supply pump 12 has been stopped, by varying the contents of the notification according to the situation. - In the embodiment of the present invention configured as described above, if the
fuel container 13 becomes empty to disrupt fuel supply started by turning on thefuel supply switch 14, thefuel supply pump 12 is automatically stopped and can thus be prevented from being seized. The automatic stoppage of thefuel supply pump 12 is based on the determination, by the control section CPU, of whether or not fuel has been supplied based on the signal from thefuel gauge 15, which monitors the amount of fuel remaining in thefuel tank 8. This eliminates the need for a dedicated sensor that monitors fuel supply. As a result, the number of components can be reduced, and the maintenance of the sensor is not needed. - Furthermore, in the embodiment, when the fuel supply amount is determined to be excessively small during fuel supply, the
strainer 11 is determined to be clogged, and this is determined to be abnormal. Then the fuel supply pump is automatically stopped. As a result, measures for dealing with the cloggedstrainer 11 can be immediately taken to improve workability. Determination of whether or not thestrainer 11 is clogged is made based on calculation by the control section CPU, which makes determination for the case where fuel supply has been disrupted. This eliminates the need for a dedicated sensor that detects the clog, thus reducing the number of components and enhancing maintainability. - Moreover, if such abnormalities occur, the first and
second sensors - Furthermore, determination of whether or not fuel supply has been abnormal is made when the preset timer time is exceeded. As a result, possible malfunction can be prevented when an abnormality signal is input due to noise or the like.
- The present invention can be utilized in the field of a fuel supply apparatus in a construction machine such as a hydraulic excavator.
- 1 Traveling machine body
- 8 Fuel tank
- 11 Strainer
- 12 Fuel supply pump
- 13 Fuel container
- 14 Fuel supply switch
- 15 Fuel gauge
- 16 Fuel meter
- 17 First timer
- 18 First notification means
- 19 Second timer
- 20 Second notification means
- CPU Control section
Claims (4)
1. A fuel supply apparatus in a construction machine including a fuel tank, the apparatus comprising:
a fuel supply pump for supplying fuel to the fuel tank,
a strainer that filters the fuel supplied to the fuel tank, and
a control section for calculating a remaining amount of fuel in response to a signal from a fuel gauge measuring the amount of fuel remaining in the fuel tank, and for outputting the calculated remaining amount to a fuel meter for displaying the amount, wherein the control section further includes:
fuel supply determining means for determining whether or not fuel is being fed into the fuel tank using the signal from the fuel gauge when the fuel supply pump is active, and
fuel supply pump stopping means for stopping the fuel supply pump based upon an indication by the fuel supply determining means.
2. The fuel supply apparatus in a construction machine according to claim 1 , wherein the fuel supply determining means determines the fuel being supplied unit of time, and when the fuel supply amount per unit of time is not larger than a set supply rate, the fuel supply pump stopping means stops the fuel supply pump.
3. The fuel supply apparatus in a construction machine according to claim 1 , further comprising notification means, wherein the control means outputs a notification instruction to said notification means to give a notification when the fuel supply pump stopping means stops the fuel supply pump.
4. The fuel supply apparatus in a construction machine according to claim 1 , wherein the control section includes timer control means for instructing the fuel supply pump stopping means to stop the fuel supply pump when a fuel supply stoppage condition has lasted for a preset timer time.
Applications Claiming Priority (3)
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JP2014-239563 | 2014-11-27 | ||
JP2014239563A JP6362166B2 (en) | 2014-11-27 | 2014-11-27 | Fuel supply equipment for construction machinery |
PCT/EP2015/077455 WO2016083348A1 (en) | 2014-11-27 | 2015-11-24 | Fuel supply apparatus in construction machine |
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US20170314520A1 true US20170314520A1 (en) | 2017-11-02 |
US10197024B2 US10197024B2 (en) | 2019-02-05 |
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US15/526,482 Active US10197024B2 (en) | 2014-11-27 | 2015-11-24 | Fuel supply apparatus in construction machine |
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US (1) | US10197024B2 (en) |
JP (1) | JP6362166B2 (en) |
WO (1) | WO2016083348A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170016374A1 (en) * | 2015-07-15 | 2017-01-19 | Caterpillar Sarl | Synthetic Resin Tank |
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US20030056824A1 (en) * | 2000-10-03 | 2003-03-27 | Harvey Richard W. | Fuel transfer pump and control |
US20050241622A1 (en) * | 2004-04-30 | 2005-11-03 | Dickerson Steven J | Fuel system |
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JPH0518939U (en) * | 1991-08-22 | 1993-03-09 | 三菱農機株式会社 | Fuel supply automatic stop device |
JP2005291636A (en) | 2004-03-31 | 2005-10-20 | Noritz Corp | Lubricating device |
JP4651557B2 (en) * | 2006-02-22 | 2011-03-16 | 株式会社クボタ | Swivel work machine |
JP5093016B2 (en) * | 2008-09-17 | 2012-12-05 | コベルコ建機株式会社 | Fuel supply device |
JP5385829B2 (en) * | 2010-03-16 | 2014-01-08 | 日立住友重機械建機クレーン株式会社 | Refueling device and work machine |
JP5402875B2 (en) * | 2010-08-20 | 2014-01-29 | コベルコ建機株式会社 | Construction equipment filter clogging detection device |
JP2012096580A (en) * | 2010-10-29 | 2012-05-24 | Iseki & Co Ltd | Fuel replenishment device of working machine |
JP2011173590A (en) * | 2011-04-11 | 2011-09-08 | Kobelco Contstruction Machinery Ltd | Working machine |
-
2014
- 2014-11-27 JP JP2014239563A patent/JP6362166B2/en active Active
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2015
- 2015-11-24 US US15/526,482 patent/US10197024B2/en active Active
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Patent Citations (2)
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US20030056824A1 (en) * | 2000-10-03 | 2003-03-27 | Harvey Richard W. | Fuel transfer pump and control |
US20050241622A1 (en) * | 2004-04-30 | 2005-11-03 | Dickerson Steven J | Fuel system |
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US20170016374A1 (en) * | 2015-07-15 | 2017-01-19 | Caterpillar Sarl | Synthetic Resin Tank |
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JP6362166B2 (en) | 2018-07-25 |
US10197024B2 (en) | 2019-02-05 |
JP2016102409A (en) | 2016-06-02 |
WO2016083348A1 (en) | 2016-06-02 |
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